swervo513;5144188; said:
Have a poke around Google for "isomorphic". As said above, behavior is one of the best ways to tell, IF you have specimens that are actually spawning/courting with one another. Remember these are a social cichlid who need a group to establish a pecking order. It's easy with a low number of fish in the group to easily mistake dominance of an alpha as male vs female when in fact that might not be the case. Filament length and nuchal humps are not accurate ways to sex anything from the "suri complex" IMO.
